I see it on most every block that the process involves the block being pivoted back and forth, even on the same machine/ same process/ same setup using the cam tunnel with a bar through it and one through the mains. Even done on large cnc machine centers.

For sure the old kb place had become a cobblers workshop, but the lifter problem is tough for some reason. Ive even seen it in billet blocks where all points of reference were derived on the start.

Like i said i feel good that KB (NEW KB) will have this sorted out either by doing it, or giving the blocks to competent people to do it.

Just for fun check the cam timing front, to back, bank, to bank on most anything, provided you have a accurate cam. Since in most cases it can't be practically corrected once done, it explains some of the weirdness in individual cylinder timing beyond the normal patterns for different firing orders.